Explanation

• A vacuum tube is also known as an electronic valve because it can control the flow of electrons.
• It especially allowing current to flow primarily in one direction in diode-type vacuum tubes.
• The term “valve” comes from its ability to control or regulate electron flow.
• A diode vacuum tube has two electrodes and permits current mainly in one direction.
• Vacuum tubes were widely used in early computers, radios, televisions, and amplifiers.

Last verified on 10-08-2026

Explanation

• The function of a web browser is to view and interact with web content.
• A web browser is software used to access and display websites on the Internet.
• It retrieves web pages from web servers and displays text, images, videos, and other content.
• Examples include Google Chrome, Mozilla Firefox, Microsoft Edge, and Safari.
• Browsers use web technologies such as HTML, CSS, and JavaScript to display interactive web pages.

Last verified on 10-08-2026

Explanation

• To adjust a column width to fit its contents in Excel, you can:
• Double-click the boundary to the right of the column heading.
• This action automatically resizes the column width to match the longest entry in that column.
• This ensuring that all data is visible without manually adjusting the width.

Last verified on 10-08-2026

Explanation

• =SUM(A1:A10) is the formula used to calculate the sum of cells A1 through A10.
• The SUM function adds values in a specified range of cells.
• It is one of the most commonly used spreadsheet functions.
• The colon (:) indicates a continuous range of cells.
• It works in spreadsheet software like Excel and Google Sheets.

Last verified on 08-06-2026

Explanation

• Charles Babbage's computer was called the Analytical Engine.
• He was an English mathematician, inventor, and mechanical engineer.
• He designed the Analytical Engine, a general-purpose mechanical computer concept.
• Babbage worked on the Analytical Engine during the 19th century until his death in 1871.
• The Analytical Engine was designed to perform calculations and follow programmed instructions.
• Charles Babbage is widely known as the “Father of the Computer.”

Last verified on 10-08-2026

Explanation

• The thin black cross-shaped pointer in MS Excel is used to complete lists and fill patterns.
• It is known as the Fill Handle.
• The Fill Handle appears at the bottom-right corner of the selected cell.
• Dragging it can automatically fill adjacent cells with data, formulas, numbers, dates, or patterns.
• It can extend sequences such as 1, 2, 3, 4... or Monday, Tuesday, Wednesday...
• It saves time by automatically completing repetitive data.

Last verified on 10-08-2026

Explanation

• Data, sort is used for arranging data in ascending/descending order in MS Excel.
• Sort A to Z to perform an ascending sort (A to Z or smallest number to largest).
• Sort Z to A to perform a descending sort (Z to A or largest number to smallest).

Last verified on 10-08-2026

Explanation

• Shift + Enter inserts a manual line break in MS Word without starting a new paragraph.
• It moves the cursor to the next line while keeping the text within the same paragraph.

Additional information:

• Enter: Starts a new paragraph.
• Ctrl + Enter: Page break.

Last verified on 09-08-2026

Explanation

• SMS stands for Short Message Service.
• It is a text messaging service used on mobile phones and other communication systems.
• SMS was defined in 1986 as part of the Global System for Mobile Communications (GSM) standards.
• The first SMS message was sent on 3 December 1992.
• The first SMS was sent by Neil Papworth from a computer to a Vodafone mobile phone.
• First SMS Content: “Merry Christmas”.

Last verified on 09-08-2026

Explanation

• Mesh topology has the highest reliability.
• Because devices have multiple direct connections.
• If one connection fails, data can usually travel through another available path.

Additional information:

• Star topology depends heavily on its central hub or switch.
• Ring topology can be disrupted if a critical connection or device fails.

Last verified on 09-08-2026